November 2024release Exterior Exterior: 18K yellow gold Back: 18K yellow gold + sapphire glass Back: See-through screw back Glass material: Box-shaped sapphire Coating: Internal anti-reflective coating Case size: 38.8 mm (width) 43.7 mm (height) 10.4 mm (thickness) Band Width: 19mm Band Material: Crocodile Movement Movement: 9SA4 Instructions Driving System: Mechanical Hand-wound Duration: Approx. 80 hours on maximum winding Static Accuracy: +5 seconds to -3 seconds per day on average Accuracy measured under the conditions of 6 different positions and 3 different temperatures before shipment from the factory in accordance with Grand Seiko's own standards. It differs from the accuracy (portable accuracy) under the environment in which the watch is actually used by the customer. Also, due to the characteristics of mechanical models, depending on the conditions of use (carrying time, temperature, arm movement, strong shocks or vibrations), the accuracy may exceed the aforementioned range. Portable accuracy: +8 to -1 sec. per day Functions Water resistance: Water resistant for everyday use Anti-Magnetic: Yes Other: Yes 18K yellow gold crown Limited edition" on the back cover Serial number on back cover Power reserve indicator